I Am An Atheist

Even if there was a god, prayers are useless.
Why? Because first of all, the Christian god is said to have a plan which implies that he had already made up his mind about everything that would happen, so why would he change his plan to a random person's liking?
And second of all, because apparently everything comes down to our "free will"; whenever I'd tell Christians that despite all their prayers for me I was still an atheist, they'd tell me it was ultimately my "choice", which pretty much implies that prayers don't do shit.